<span style="font-size:18px;color:#ff0000;">請注意你要安裝opencv，復制代碼后要配置opencv環(huán)境，然后找個視頻把代碼中路徑改為你視頻路徑。</span> #include "cv.h" #include "highgui.h" #include <time.h> #include <math.h> #include <stdio.h> #include <string.h> // various tracking parameters (in seconds) //跟蹤的參數(shù)（單位為秒） const double MHI_DURATION = 1;//0.5s為運動跟蹤的最大持續(xù)時間 //const double MAX_TIME_DELTA = 1; //最大時間增量為0.5s //const double MIN_TIME_DELTA = 0.05; //最小時間增量0.05s const int N = 3; // const int CONTOUR_MAX_AERA = 900; // ring image buffer 圈出圖像緩沖 IplImage **buf = 0;//指針的指針 int last = 0; // temporary images臨時圖像 IplImage *mhi = 0; // MHI: motion history image 運動歷史圖像CvConnectedComp *cur_comp, min_comp; //連接部件 CvConnectedComp comp; CvMemStorage *storage; //內存存儲器 CvPoint pt[4]; //二維坐標系下的點，類型為整型 ，通常以0點為原點，有x坐標和y坐標int nCurFrameIndex = 0;// 參數(shù)： // img - 輸入視頻幀 // dst - 檢測結果 void update_mhi( IplImage* img, IplImage* dst, int diff_threshold ) { double timestamp = clock()/100.; // get current time in seconds 時間戳 CvSize size = cvSize(img->width,img->height); // get current frame size，得到當前幀的尺寸 int i, idx1, idx2; IplImage* silh; //width和height通過&運算變?yōu)閕mg的一半 IplImage* pyr = cvCreateImage( cvSize((size.width & -2)/2, (size.height & -2)/2), 8, 1 );CvMemStorage *stor; CvSeq *cont; /*先進行數(shù)據(jù)的初始化*/ if( !mhi || mhi->width != size.width || mhi->height != size.height ) { if( buf == 0 ) //若尚沒有初始化則分配內存給他 { buf = (IplImage**)malloc(N*sizeof(buf[0])); memset( buf, 0, N*sizeof(buf[0])); } for( i = 0; i < N; i++ ) { cvReleaseImage( &buf[i] ); buf[i] = cvCreateImage( size, IPL_DEPTH_8U, 1 ); cvZero( buf[i] );// clear Buffer Frame at the beginning } cvReleaseImage( &mhi ); mhi = cvCreateImage( size, IPL_DEPTH_32F, 1 ); cvZero( mhi ); // clear MHI at the beginning } // end of if(mhi) /*將當前要處理的幀轉化為灰度放到buffer的最后一幀中*/ cvCvtColor( img, buf[last], CV_BGR2GRAY ); // convert frame to grayscale /*設定幀的序號*/ idx1 = last; idx2 = (last + 1) % N; // index of (last - (N-1))th frame last = idx2; // 做幀差 silh = buf[idx2];//差值的指向idx2 cvAbsDiff( buf[idx1], buf[idx2], silh ); // get difference between frames // 對差圖像做二值化 cvThreshold( silh, silh, 30, 255, CV_THRESH_BINARY ); //threshold it,二值化 第三個參數(shù)閾值會影響效果//去掉超時的影像以更新運動歷史圖像 cvUpdateMotionHistory( silh, mhi, timestamp, MHI_DURATION ); // update MHI cvCvtScale(mhi,dst,255./MHI_DURATION,(MHI_DURATION-timestamp)*255./MHI_DURATION); cvCvtScale(mhi,dst,255./MHI_DURATION,0); //cvConvert( mhi, dst );//將mhi轉化為dst,dst=mhi // 中值濾波，消除小的噪聲 cvSmooth( dst, dst, CV_MEDIAN, 3, 0, 0, 0 ); cvPyrDown( dst, pyr, CV_GAUSSIAN_5x5 );// 向下采樣，去掉噪聲，圖像是原圖像的四分之一 cvDilate( pyr, pyr, 0, 1 ); // 做膨脹操作，消除目標的不連續(xù)空洞 cvPyrUp( pyr, dst, CV_GAUSSIAN_5x5 );// 向上采樣，恢復圖像，圖像是原圖像的四倍 // 下面的程序段用來找到輪廓 // Create dynamic structure and sequence. stor = cvCreateMemStorage(0); cont = cvCreateSeq(CV_SEQ_ELTYPE_POINT, sizeof(CvSeq), sizeof(CvPoint) , stor); // 找到所有輪廓 //cvFindContours( dst, stor, &cont, sizeof(CvContour), //CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0)); cvFindContours( dst, stor, &cont, sizeof(CvContour), 1, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0)); // 直接使用CONTOUR中的矩形來畫輪廓 for(;cont;cont = cont->h_next) { CvRect r = ((CvContour*)cont)->rect; if(r.height * r.width > CONTOUR_MAX_AERA) // 面積小的方形拋棄掉 { cvRectangle( img, cvPoint(r.x,r.y), cvPoint(r.x + r.width, r.y + r.height), CV_RGB(255,0,0), 1, CV_AA,0); } } // free memory cvReleaseMemStorage(&stor); cvReleaseImage( &pyr ); } int main(int argc, char** argv) { //保存視頻文件 //!將保存視頻文件的名字設置成"FVideoSave.avi" char szVideoSaveName[] = "VideoSave.avi"; CvVideoWriter * pVideoWriter = 0; //用于保存視頻文件 //IplImage * pFrame = NULL; //IplImage * pImage = NULL; IplImage* motion = 0; CvCapture* capture = 0; capture = cvCaptureFromAVI("F:\\OPENCV實驗室\\test.avi" );//AVI為視頻來源 if( capture ) { cvNamedWindow( "Motion", 1 );//建立窗口 int frameH = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);//liumengint frameW = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);//liumengint fps = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);//liumeng //創(chuàng)建視頻寫入器 //pVideoWriter=cvCreateVideoWriter(/*"VideoSave.avi"*/szVideoSaveName,/*CV_FOURCC('M','J', 'P', 'G')*/-1 ,25,cvSize(640,480),1); pVideoWriter=cvCreateVideoWriter(szVideoSaveName,CV_FOURCC('M','J', 'P', 'G'),25,cvSize(frameW,frameH),1); for( ; ; ) { IplImage* image; if( !cvGrabFrame( capture ))//捕捉一楨 break; image = cvRetrieveFrame( capture );//取出這個幀 if( image )//若取到則判斷motion是否為空 { if( !motion ) { motion = cvCreateImage( cvSize(image->width,image->height), 8, 1 ); //創(chuàng)建motion幀，八位，一通道 cvZero( motion ); //零填充motion motion->origin = image->origin; //內存存儲的順序和取出的幀相同 } } update_mhi( image, motion, 60 );//更新歷史圖像 cvShowImage( "Motion", image );//顯示處理過的圖像 // pVideoWriter = cvCreateVideoWriter(/*"VideoSave.avi"*/szVideoSaveName,-1 ,10,cvSize(640,480),1);//放在里有視頻只會有一幀注意 //cvWriteFrame(pVideoWriter,image); // cvReleaseVideoWriter(&pVideoWriter); if( cvWaitKey(10) >= 0 )//10ms中按任意鍵退出 break; } cvReleaseVideoWriter(&pVideoWriter);//釋放寫入器 cvReleaseCapture( &capture );//釋放設備 cvDestroyWindow( "Motion" );//銷毀窗口 } return 0; }

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